82169012 has 6 divisors (see below), whose sum is σ = 143795778. Its totient is φ = 41084504.

The previous prime is 82169011. The next prime is 82169039. The reversal of 82169012 is 21096128.

It can be written as a sum of positive squares in only one way, i.e., 80928016 + 1240996 = 8996^2 + 1114^2 .

It is a super-2 number, since 2×82169012² = 13503493066112288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82169011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10271123 + ... + 10271130.

It is an arithmetic number, because the mean of its divisors is an integer number (23965963).

Almost surely, 2^82169012 is an apocalyptic number.

It is an amenable number.

82169012 is a deficient number, since it is larger than the sum of its proper divisors (61626766).

82169012 is a wasteful number, since it uses less digits than its factorization.

82169012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20542257 (or 20542255 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 82169012 is about 9064.7124609664. The cubic root of 82169012 is about 434.7464272796.

The spelling of 82169012 in words is "eighty-two million, one hundred sixty-nine thousand, twelve".